Show HN: Kichan AI, free Chrome extension that generates and injects userscripts

I’ve been working on KICHAN, a Chrome extension that turns your requests into JavaScript user scripts and runs them instantly.

• Ask it to “add a column to that table”, “highlight email addresses”, “add a ‘Download’ button”, etc.

• The extension sends the request plus the page context and whatever you right clicked to Google Gemini, then injects the generated code.

• Then you can save the script; next time you hit the same domain/url you can set it to auto run or run manually. Over time you build a library of tested scripts you (and others) can reuse.

Why I’m excited: each saved script is a callable primitive. Once you have a collection, an LLM agent could chain them together to automate bigger workflows that aren’t automated today. This part is still not implemented but is a long term goal.

I just had the idea and had to build it. I mostly have used it to automate a browser game that then banned me. Twice.

Caveats:

• Very beta, is quite rough, and some CSP/iframe/canvas heavy sites can block injections.

• I am not a javascript or web developer. It is heavily vibecoded. Expect some bugs.

Feedback, reviews, ideas on how to improve etc. are welcome. If you can leave a review in the chrome extension store it would be great.

Website: https://kichan.ai

Extension: https://chromewebstore.google.com/detail/kichan-ai-web-augme...

Twitter: https://x.com/kichan_ai